/*
 * This is Melet, a salary slip designer. Feed it with data regarding to salary payment, prepare it for print through the graphical presentation, and you have it done.
 * Copyright (C) 2014, AFDiaX
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * This program is based on UMLet, a Free UML Tool for Fast UML Diagrams.
 * To contact the authors of UMLet visit https://code.google.com/p/umlet/people/list
 * To contact the authors of Melet visit https://gna.org/users/gabocze
 */
package com.baselet.gui.command;

import java.awt.Point;
import java.util.Vector;

import com.baselet.control.constants.Constants;
import com.baselet.diagram.DiagramHandler;
import com.baselet.element.interfaces.GridElement;

public class Cut extends Command {

	private Vector<GridElement> entities;
	private Point origin;

	public Cut() {

	}

	@Override
	public void execute(DiagramHandler handler) {

		super.execute(handler);
		if (entities == null) {
			entities = new Vector<GridElement>();
			entities.addAll(handler.getDrawPanel().getSelector().getSelectedElements());
		}

		if (entities.isEmpty()) {
			return;
		}

		// AB: clipboard copy scales the entities to 100%, so we don't have to do it manually
		ClipBoard.getInstance().copy(entities, handler);
		new RemoveElement(entities, false).execute(handler);

		// AB: copy origin and zoom it to 100%
		origin = handler.getDrawPanel().getOriginAtDefaultZoom();

		handler.getDrawPanel().updatePanelAndScrollbars();
	}

	@Override
	public void undo(DiagramHandler handler) {
		super.undo(handler);

		// We must zoom to the defaultGridsize before execution
		int oldZoom = handler.getGridSize();
		handler.setGridAndZoom(Constants.DEFAULTGRIDSIZE, false);

		int offsetX = origin.x - handler.getDrawPanel().getOriginAtDefaultZoom().x;
		int offsetY = origin.y - handler.getDrawPanel().getOriginAtDefaultZoom().y;

		for (GridElement e : entities) {
			new AddElement(e, handler.realignToGrid(true, e.getRectangle().x + offsetX), handler.realignToGrid(true, e.getRectangle().y + offsetY)).execute(handler);
		}
		handler.getDrawPanel().repaint();

		// And zoom back to the oldGridsize after execution
		handler.setGridAndZoom(oldZoom, false);

		handler.getDrawPanel().getSelector().select(entities); // undo selects the cutted entities

		handler.getDrawPanel().updatePanelAndScrollbars();
	}
}
